Dockerfile

# syntax = docker/dockerfile:1.21.0

# build backend
FROM golang:1.26.2-alpine as server-build
RUN --mount=type=cache,target=/var/cache/apk \
  apk add --update git

WORKDIR /github.com/traPtitech/anke-to

COPY go.mod go.sum ./
RUN go mod download

COPY . .

RUN --mount=type=cache,target=/root/.cache/go-build \
  go build -o /anke-to -ldflags "-s -w"

# run
FROM alpine:3.23.3
WORKDIR /app

RUN apk --update --no-cache add tzdata \
  && cp /usr/share/zoneinfo/Asia/Tokyo /etc/localtime \
  && apk del tzdata \
  && mkdir -p /usr/share/zoneinfo/Asia \
  && ln -s /etc/localtime /usr/share/zoneinfo/Asia/Tokyo
RUN apk --update --no-cache add ca-certificates \
  && update-ca-certificates \
  && rm -rf /usr/share/ca-certificates

COPY --from=server-build /anke-to ./
ENTRYPOINT ./anke-to